Adds a shell script that can act as a mutex for Make in a particular directory. This is a problem when make recurses into the same target-lib directory from multiple application targets simultaneously.
Adds a shell script that can act as a mutex for Make in a particular directory.
This is a problem when make recurses into the same target-lib directory from multiple application targets simultaneously.

bakerstu/openmrn,bakerstu/openmrn,bakerstu/openmrn,bakerstu/openmrn,bakerstu/openmrn,bakerstu/openmrn